Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2d0312699412ca…

MALICIOUS

PDF

88.6 KB Created: 2021-04-02 15:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5d87e9c293ad2a9baf1c9cb9dfaa50eb SHA-1: cdf53981c0a628c21beee966a5fe3607be7b58a4 SHA-256: fa2d0312699412ca3bd95f5c2152735ecdf3153cec8cea2092ddc426eb89e8d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as a link farm and flagged by ML classifiers and ClamAV as malicious. The PDF's content, though heavily obfuscated, suggests an attempt to disguise its malicious nature. The presence of an external URI and the overall detection by multiple security tools strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/award?keyword=lateral+thinking+questions+pdf PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/nodizisivukaboledopekuv.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/zoverasunekapevinezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/03da830b-d6dc-4e50-a85a-18cb0fa6ebc8/star_trek_discovery_season_1_cast.pdfIn PDF document text
    • http://ropipowewigu.epizy.com/the_magicians_season_5_episode_10_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b6e166-0de6-4377-8202-dc22c8adc91a/what_are_brittle_stars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b17240-271c-4c9d-b751-91727938c0cb/2012_hyundai_sonata_limited_for_sale_under_5000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a45b06c-19a6-4df0-9a8a-ea3d89c120e5/98697086350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ca44c3-e4b9-4721-b014-e09941fbe0fe/vikal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207d1197-b42e-4082-bef6-ac2b14fb1ec9/vacation_pay_upon_termination_bc.pdfIn PDF document text
    • http://rakixufemagotut.atwebpages.com/kisivefonofopa.pdfIn PDF document text
    • http://livofos.epizy.com/kogibexorazewok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcf6df2-4b26-4253-bd16-bc5f8ff6a8ef/venn_diagram_example_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3fe02e9-afb4-4907-b90e-c97e3e134bdb/95503982947.pdfIn PDF document text
    • http://lanikudawojag.rf.gd/jess_glynne_hold_my_hand_sheet_music.pdfIn PDF document text
    • http://vukirulavobos.epizy.com/8038555753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a862d6-5259-4f7f-9ebe-4757ab404b4d/difficult_word_search_puzzles.pdfIn PDF document text
    • http://fanuzisi.epizy.com/element_compound_and_mixture_worksheet_answer_key.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E79 5316 bytes
SHA-256: 0d2aa1549d55f4a04ba3a849ec10466ef0025da75a5c88cd8744e0da8b7f49e5
font_01_sfnt_off0001207e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 11364 bytes
SHA-256: ccc4456ca177f712d3968858c11c6878673650b26c35b7c5d1d31b84fc11f17e
font_02_sfnt_off0001471b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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